Block is 0.400 in. Long, 0.340 in.Wide, 0.275 in. High, a 0.188 in. To 0.193 in. Through hole is located 0.200 in. From the end, a 0.096 in. Porm 0.001 in. Through hole is located on the end of the block, 0.100 in. From the top and intersects the 0.188 in. Hole; material aluminum alloy qq-a-200/86061-t6; surface treatment, mil-c-5541, chem film class 3